package cn.edu.ctbu.labtest.service.impl;


import cn.edu.ctbu.labtest.constant.REnum;
import cn.edu.ctbu.labtest.domain.Student;
import cn.edu.ctbu.labtest.exception.RException;
import cn.edu.ctbu.labtest.repository.StudentRepository;
import cn.edu.ctbu.labtest.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import java.util.List;
@Service
public class StudentImplService implements StudentService {
    @Autowired
    private StudentRepository studentRepository;
    public List<Student> findAll(){

        return studentRepository.findAll();
    }

    /**
     * 只支持分页的查询
     * @param pageable
     * @return
     */
    public Page<Student> findAll(Pageable pageable){
        return studentRepository.findAll(pageable);
    }

    /**
     * 分页，带过滤的查询
     * @param student
     * @param pageable
     * @return
     */
    public Page<Student> findAll(Example<Student> student,Pageable pageable){
        return studentRepository.findAll(student,pageable);
    }

    /**
     * 按id查询
     * @param id 主键,整数
     * @return
     * */

    public Student findById(Integer id) {

        return studentRepository.findById(id).orElse(null);
    }

    public Student getById(Integer id){
        return studentRepository.findById(id).orElse(null);
    }
    /**
     * 按名字查询
     * @param name
     * @return
     */

    public List<Student> findByName(String name) {

        return studentRepository.findByNameLike(name);
    }

    /**
     * 按名字和密码查询
     * @param name
     * @param password
     * @return
     */
    public List<Student> findByNameAndPassword(String name,String password) {
        return studentRepository.findByNameAndPassword(name,password);
    }

    /**
     * 按学号和密码查询
     * @param no
     * @param password
     * @return
     */
    public List<Student> findByNoAndPassword(String no,String password) {
        return studentRepository.findByNoAndPassword(no,password);
    }

    /**
     * 新增
     *
     * @param student
     * @return
     */
    public Student insert(Student student){
        return studentRepository.save(student);
    }

    /**
     * 修改
     *
     * @param student
     * @return
     */
    public Student update(Student student){
        return studentRepository.save(student);
    }

    /**
     * 删除
     *
     * @param
     * @return
     */
    public void delete(Integer id){
        Student student=new Student();
        student.setId(id);
        studentRepository.delete(student);
    }
    public void delete(Student student){
        studentRepository.delete(student);
    }

    /**
     * 增加
     *
     * @param student
     * @return
     */
    public Student add(Student student){
        return studentRepository.save(student);
    }
    @Override
    public Student validateUsernameAndPassword(String username,String password) throws Exception{
        List<Student> students=studentRepository.findByNo(username);
        if (students.size()>0){
            //可能对password加密，暂时不做处理
            Student student=students.get(0);
            if (student.getPassword().equals(password)){
                //表示成功
                return student;
            }else {
                throw new RException(REnum.LOGIN_ERR);
            }
        }else {
            throw new RException(REnum.LOGIN_ERR);
        }
    }
}

